package com.jianyi.mall.exception;

import com.jianyi.mall.common.ApiRestResponse;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.ArrayList;
import java.util.List;

/**
 * @Author: YANSHAO
 * @Description: 处理统一异常的handler
 * @Date: 2021/2/3 15:44
 */
@ControllerAdvice
public class GlobalExceptionHandler {
    private final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    @ExceptionHandler(Exception.class)
    @ResponseBody
    public Object handleException(Exception e) {
        log.error("Default Exception:",e);
        return ApiRestResponse.error(JianyiMallExceptionEnum.SYSTEM_ERROR);
    }

    @ExceptionHandler(JianyiMallException.class)
    @ResponseBody
    public Object handlejianyiMallException(JianyiMallException e) {
        log.error("JianyiMallException:",e);
        return ApiRestResponse.error(e.getCode(),e.getMessage());
    }


    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseBody
    public ApiRestResponse handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
        log.error("MethodArgumentNotValidException: ",e);
        return handleBindingResult(e.getBindingResult());
    }

    private ApiRestResponse handleBindingResult(BindingResult result) {
        //把异常处理为对外暴露的提示
        List<String> list = new ArrayList<>();
        if (result.hasErrors()){
            List<ObjectError> allErrors = result.getAllErrors();
            for (ObjectError objectError : allErrors) {
                String message = objectError.getDefaultMessage();
                list.add(message);
            }
        }
        if (list.size() == 0) {
            return ApiRestResponse.error(JianyiMallExceptionEnum.REQUEST_PARAM_ERROR);
        }

        return ApiRestResponse.error(JianyiMallExceptionEnum.REQUEST_PARAM_ERROR.getCode(), list.toString());

    }
}
